Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, P.R. China.
Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, P.R. China.
Ecotoxicol Environ Saf. 2018 Dec 15;165:19-24. doi: 10.1016/j.ecoenv.2018.08.047. Epub 2018 Aug 31.
The use of pesticides in rice can not only manage the pest but also influence non-target organisms. The rove beetle (Paederus fuscipes), which is an important predator of the brown plant hopper (Nilaparvata lugens) in rice ecosystems, was tested to investigate acute and chronic effects of emamectin benzoate. The results from this study show that the LC50 of emamectin benzoate to adults of P. fuscipes at 72 h was 3.07 (1.84-4.54) mg a.i. L, whereas the LC50 of emamectin benzoate to the second instar larvae of P. fuscipes at 72 h was 2.58 (1.95-3.19) mg a.i. L. Tested sublethal doses (LC10 and LC30) had significant effects on the second instar developmental time of P. fuscipes compared with that of the control. The LC30 dose had a negative influence on the pre-imaginal developmental duration and the feeding potential of treated P. fuscipes larvae. Additionally, the LC30 reduced the pre-oviposition period, the fecundity and the body weight of adults emerged from treated larvae of P. fuscipes. In the sublethal experiment with adults, the fecundity and the feeding potential were significantly reduced at the LC30 dose. These results revealed that sublethal doses of emamectin benzoate negatively affected the development and biological activities of P. fuscipes, and we conclude that more attention should be paid to the use of this chemical as part of integrated pest management strategies.
在水稻中使用农药不仅可以防治害虫，还会影响非靶标生物。拟步甲科的步甲（Paederus fuscipes）是水稻生态系统中褐飞虱（Nilaparvata lugens）的重要捕食者，本研究测试了甲氨基阿维菌素苯甲酸盐对其的急性和慢性影响。结果表明，拟步甲成甲氨基阿维菌素苯甲酸盐在 72 h 的 LC50 为 3.07（1.84-4.54）mg a.i. L，而拟步甲二龄幼虫在 72 h 的 LC50 为 2.58（1.95-3.19）mg a.i. L。与对照相比，测试的亚致死剂量（LC10 和 LC30）对拟步甲二龄幼虫的发育时间有显著影响。LC30 剂量对处理后拟步甲幼虫的预蛹期和取食潜力有负面影响。此外，LC30 降低了预产卵期、成虫的产卵量和体重。在成甲氨基阿维菌素苯甲酸盐的亚致死实验中，LC30 剂量显著降低了成虫的繁殖力和取食潜力。这些结果表明，亚致死剂量的甲氨基阿维菌素苯甲酸盐会对拟步甲的发育和生物活性产生负面影响，我们得出结论，在综合虫害管理策略中应更加关注这种化学物质的使用。
